Method of and means for artificial-tooth fastening



Oct. 23, 1928. I 1,688,517

- J. BEISLER METHOD OF AND MEANS FOR ARTIFICIAL TOOTH FASTENING Filed Jan. 21, 1927 Aw/-A 7-0/3 M46275; 715:

Patented @ct, 25,1928.

' ts-sam- Jessi BEI'SLER, or HAMBURG, GERMANY.

METHOD on; ann- MEKNSFFGR AR'rrrrcraL-roorrr ras rnn ino.

This invention relates to a method of and means for securing artificialteeth on the gum or tooth remnant through the provision of a backing plate with which the porcelain portion of the tooth is connected in a manner to secure the parts against separation;

In carrying out the method, the porcelain section is provided with the usual securing pin which, in this instance, is terminally headed and the backing plate is molded about a cap designed to receive the headed end of the pin and also to receive cement in which the headed end of the pin is embedded, The cap, which as stated is molded into the backing plate, has an opening for the receptionof a pin which corresponds approsimately in size with that of the headed end of the pin, such cap inwardly of the opening being of gradu ally increasing diameter to provide for the maximum cement reception and to insure a firm and complete grip of the pin.

The method and means is illustrated in the accompanying drawings, in which:

Figure 1 is a vertical sectional view-show ing a completed tooth. Figure 2 is a face view of the rear plate;

In carrying out the method, the porcelain section a of the tooth is provided as usualwith the securing pin (Z, the free end of the pin, for the purpose an enlarged head 0. The cap f is placed over the projecting end of the pin, this cap being of the form shown in section inFigur'e 1, that is having an entrance or opening it which corresponds approximately to the size of the head 0 of the pin, such cap inwardly of-the opening being of increased diameter witharounded closed outer end. The cap has a depth approximating yond the porcelain section of the tooth.

The backing plate, which is modeled from wax or like materials, is pressed over the cap 0 against the porcelain section of the teeth a, thus embedding the cap in the backing plate model. The model or wax backing plate is then carefully withdrawn, carrying with it the cap 0, and the model is used for a casting. of the appropriate backing plate 6 in desired material, as gold or the like. In this casting, of course, the cap 0 is embedded in the backing plate material in proper position.

Following the formation of the backing plate with the embedded cap 0, the cap is filled with cement, indicated at g, and the backing plate pressed against the porcelain section a, the cap, of course, being passed over the pin d.

of the present invention, having the full projection of the pin be- The pin naturally tends'to displace some of the cement and the latter will flow between the backii'lg plate and porcelain section as an a d in securing the meeting faces of these sections together, this face binding being indi cated at I 1 Obviously, as shown in Figure 2, the backng plate may be provided with a plurality of caps j to receive a plurality of pins on the porcelain tooth section.

By this method, particularly in the use of the cap of the peculiar form described, it is apparent that even if the cement fastening tends toloosen, there is little liability of the porcelain section becoming wholly displaced, for the por elain section can only be separated from the backing by the direct outward m ove ment ofthe former and in order to permit such mo ement, the mass of cement must pass tnrougn the opening h, which, of course, is of .less diameter than the cement mass in rear of the opening. 7

By the method described, the enlarged end of the pin may be said to rest in rear of a wedge-shaped mass of cement which cannot advance owing to the narrow outlet provided for it and hence. the pin and, therefore, the porcelain section of the tooth cannot become separatedfrom the backing plate.

l/Vhat is claimed as new is:

1. The herein described method of securing a porcelain tooth section to a backing plate,

headed pin into and beyond the entrance of the cap to displace a portion of the cement and cause said cement to-iill the space be tween the entrance opening of thecap and the head of the pin in a mass which in all directions radially of the axis of the pin exceeds the similar dimension of the entrance opening tothe cap. y 2. A means for securing a porcelain tooth section to a backing plate, consistlng in a sub stantially spherical pin-receiving cap having an entrance opening materially less in diameter than the maximum diameter of the cap, saidcap being designed to'be molded into the Ice backing plate With the entrance opening flush backingfplate, maintains the filling of cement With the surface of the plate, a pin projecting in the cap in advance of the head of the pin 7 from the porcelain section having a head snlo gradually convergent in all directions toward stantially corresponding in diameter With the entrance opening, to prevent the longi- I that of the entrance opening of the cap, and a tudinal movement of said cement under endfilling of cement between the head of the pin Wise pressure on the pin. L x I 15 and the entrance opening of the cap, Where- In testimony whereof I aflix my signature; by the Wall of the cap, by reasonof its diverg I Y Y v I ent relation With respect to the face of the JOSEFBEISLER. 

